I worked on the migration database integrity constraints

app/Http/Controllers/MasterController.php

@@ -1,13 +1,23 @@
 <?php
 
 namespace App\Http\Controllers;
-
+use App\School;
+use App\User;
 use Illuminate\Http\Request;
 
 class MasterController extends Controller
 {
 
     public function index() {
-        return view('masters.index');
+        $school_count = count(School::all());
+        $teachers = count(User::where('role', 'teacher')->get());
+        $students = count(User::where('role', 'student')->get());
+        $admins = count(User::where('role', 'admin')->get());
+        return view('masters.index',[
+            'school_count'=>$school_count,
+            'teachers_count'=>$teachers,
+            'students_count'=>$students,
+            'admins_count'=>$admins,
+        ]);
     }
 }

database/migrations/2014_10_12_000000_create_schools_table.php

@@ -14,7 +14,7 @@ class CreateSchoolsTable extends Migration
     public function up()
     {
         Schema::create('schools', function (Blueprint $table) {
-            $table->increments('id');
+            $table->bigIncrements('id');
             $table->string('name');
             $table->string('established')->default('');
             $table->text('about');

database/migrations/2014_10_12_100000_create_users_table.php

@@ -14,15 +14,14 @@ class CreateUsersTable extends Migration
     public function up()
     {
         Schema::create('users', function (Blueprint $table) {
-            $table->increments('id');
+            $table->bigIncrements('id');
             $table->string('name');
             $table->string('email')->unique();
             $table->string('password');
             $table->string('role');
             $table->tinyInteger('active');
-            $table->integer('school_id')->nullable();
             $table->integer('code')->nullable();//school code Auto generated
-            $table->integer('student_code')->unique()->nullable();//Auto generated
+            $table->bigInteger('student_code')->unique()->nullable();//Auto generated
             $table->string('gender')->default('');
             $table->string('blood_group')->default('');
             $table->string('nationality')->default('');
@@ -32,6 +31,8 @@ public function up()
             $table->string('pic_path')->default('');
             $table->tinyInteger('verified');
             $table->integer('section_id')->unsigned()->nullable();
+            $table->bigInteger('school_id')->unsigned()->nullable();
+            $table->foreign('school_id')->references('id')->on('schools');
             $table->rememberToken();
             $table->timestamps();
         });

database/migrations/2017_12_21_065735_create_exams_table.php

@@ -14,13 +14,15 @@ class CreateExamsTable extends Migration
     public function up()
     {
         Schema::create('exams', function (Blueprint $table) {
-          $table->increments('id');
+          $table->bigIncrements('id');
           $table->string('exam_name');
           $table->tinyInteger('active');
           $table->tinyInteger('notice_published');
           $table->tinyInteger('result_published');
-          $table->integer('school_id')->unsigned();
-          $table->integer('user_id')->unsigned();
+          $table->bigInteger('school_id')->unsigned();
+          $table->bigInteger('user_id')->unsigned();
+          $table->foreign('school_id')->references('id')->on('schools');
+          $table->foreign('user_id')->references('id')->on('users');
           $table->timestamps();
         });
     }

database/migrations/2017_12_27_025413_create_classes_table.php → database/migrations/2017_12_27_025340_create_classes_table.php

@@ -14,10 +14,11 @@ class CreateClassesTable extends Migration
     public function up()
     {
         Schema::create('classes', function (Blueprint $table) {
-            $table->increments('id');
+            $table->bigIncrements('id');
             $table->string('class_number');
-            $table->integer('school_id')->unsigned();
+            $table->bigInteger('school_id')->unsigned();
             $table->string('group');
+            $table->foreign('school_id')->references('id')->on('schools');
             $table->timestamps();
         });
     }

database/migrations/2017_12_27_025427_create_sections_table.php → database/migrations/2017_12_27_025345_create_sections_table.php

@@ -14,11 +14,14 @@ class CreateSectionsTable extends Migration
     public function up()
     {
         Schema::create('sections', function (Blueprint $table) {
-            $table->increments('id');
+            $table->bigIncrements('id');
             $table->string('section_number');
             $table->integer('room_number');
-            $table->integer('class_id')->unsigned();
-            $table->integer('user_id')->unsigned()->default(0);
+            $table->bigInteger('class_id')->unsigned();
+            $table->bigInteger('user_id')->unsigned()->default(0);
+            $table->foreign('class_id')->references('id')->on('classes');
+            $table->foreign('user_id')->references('id')->on('users');
+
             $table->timestamps();
         });
     }

database/migrations/2017_12_27_025349_create_attendances_table.php

@@ -15,11 +15,16 @@ public function up()
     {
         Schema::create('attendances', function (Blueprint $table) {
             $table->increments('id');
-            $table->integer('student_id')->unsigned();
-            $table->integer('section_id')->unsigned();
-            $table->integer('exam_id')->unsigned();
+            $table->bigInteger('student_id')->unsigned();
+            $table->bigInteger('section_id')->unsigned();
+            $table->bigInteger('exam_id')->unsigned();
             $table->tinyInteger('present')->unsigned();
-            $table->integer('user_id')->unsigned();
+            $table->bigInteger('user_id')->unsigned();
+            // $table->foreign('student_id')->references('student_code')->on('users');
+            $table->foreign('section_id')->references('id')->on('sections');
+            $table->foreign('exam_id')->references('id')->on('exams');
+            $table->foreign('user_id')->references('id')->on('users');
+
             $table->timestamps();
         });
     }

database/migrations/2017_12_27_025450_create_syllabuses_table.php

@@ -19,8 +19,10 @@ public function up()
             $table->string('title');
             $table->text('description');
             $table->tinyInteger('active');
-            $table->integer('school_id')->unsigned();
-            $table->integer('user_id')->unsigned();
+            $table->bigInteger('school_id')->unsigned();
+            $table->bigInteger('user_id')->unsigned();
+            $table->foreign('school_id')->references('id')->on('schools');
+            $table->foreign('user_id')->references('id')->on('users');
             $table->timestamps();
         });
     }

database/migrations/2017_12_27_025503_create_notices_table.php

@@ -14,13 +14,15 @@ class CreateNoticesTable extends Migration
     public function up()
     {
         Schema::create('notices', function (Blueprint $table) {
-            $table->increments('id');
+            $table->bigIncrements('id');
             $table->string('file_path');
             $table->string('title');
             $table->text('description');
             $table->tinyInteger('active');
-            $table->integer('school_id')->unsigned();
-            $table->integer('user_id')->unsigned();
+            $table->bigInteger('school_id')->unsigned();
+            $table->bigInteger('user_id')->unsigned();
+            $table->foreign('school_id')->references('id')->on('schools');
+            $table->foreign('user_id')->references('id')->on('users');
             $table->timestamps();
         });
     }

database/migrations/2017_12_27_025512_create_events_table.php

@@ -19,8 +19,10 @@ public function up()
             $table->string('title');
             $table->text('description');
             $table->tinyInteger('active');
-            $table->integer('school_id')->unsigned();
-            $table->integer('user_id')->unsigned();
+            $table->bigInteger('school_id')->unsigned();
+            $table->bigInteger('user_id')->unsigned();
+            $table->foreign('school_id')->references('id')->on('schools');
+            $table->foreign('user_id')->references('id')->on('users');
             $table->timestamps();
         });
     }

database/migrations/2017_12_27_025530_create_homeworks_table.php

@@ -17,8 +17,10 @@ public function up()
             $table->increments('id');
             $table->string('file_path');
             $table->text('description');
-            $table->integer('teacher_id')->unsigned();
-            $table->integer('section_id')->unsigned();
+            $table->bigInteger('teacher_id')->unsigned();
+            $table->bigInteger('section_id')->unsigned();
+            $table->foreign('teacher_id')->references('id')->on('users');
+            $table->foreign('section_id')->references('id')->on('sections');
             $table->timestamps();
         });
     }

database/migrations/2017_12_27_025542_create_routines_table.php

@@ -19,8 +19,10 @@ public function up()
             $table->string('title');
             $table->text('description');
             $table->tinyInteger('active');
-            $table->integer('school_id')->unsigned();
-            $table->integer('user_id')->unsigned();
+            $table->bigInteger('school_id')->unsigned();
+            $table->bigInteger('user_id')->unsigned();
+            $table->foreign('school_id')->references('id')->on('schools');
+            $table->foreign('user_id')->references('id')->on('users');
             $table->timestamps();
         });
     }

database/migrations/2017_12_27_025727_create_courses_table.php → database/migrations/2017_12_27_025549_create_courses_table.php

@@ -14,7 +14,7 @@ class CreateCoursesTable extends Migration
     public function up()
     {
         Schema::create('courses', function (Blueprint $table) {
-            $table->increments('id');
+            $table->bigIncrements('id');
             $table->string('course_name');
             $table->integer('class_id')->unsigned();
             $table->string('course_type');
@@ -35,11 +35,16 @@ public function up()
             $table->integer('ct_fullmark');
             $table->integer('final_fullmark');
             $table->integer('practical_fullmark');
-            $table->integer('school_id')->unsigned();
-            $table->integer('exam_id')->unsigned();
-            $table->integer('teacher_id')->unsigned();
-            $table->integer('section_id')->unsigned();
-            $table->integer('user_id')->unsigned();
+            $table->bigInteger('school_id')->unsigned();
+            $table->bigInteger('exam_id')->unsigned();
+            $table->bigInteger('teacher_id')->unsigned();
+            $table->bigInteger('section_id')->unsigned();
+            $table->bigInteger('user_id')->unsigned();
+            $table->foreign('school_id')->references('id')->on('schools');
+            $table->foreign('exam_id')->references('id')->on('exams');
+            $table->foreign('teacher_id')->references('id')->on('users');
+            $table->foreign('section_id')->references('id')->on('sections');
+
             $table->timestamps();
         });
     }

database/migrations/2017_12_27_025556_create_grades_table.php

@@ -34,11 +34,16 @@ public function up()
             $table->float('written', 8, 2);
             $table->float('mcq', 8, 2);
             $table->float('practical', 8, 2);
-            $table->integer('exam_id')->unsigned();
+            $table->bigInteger('exam_id')->unsigned();
             $table->integer('student_id')->unsigned();
-            $table->integer('teacher_id')->unsigned();
-            $table->integer('course_id')->unsigned();
-            $table->integer('user_id')->unsigned();
+            $table->bigInteger('teacher_id')->unsigned();
+            $table->bigInteger('course_id')->unsigned();
+            $table->bigInteger('user_id')->unsigned();
+            // $table->foreign('student_id')->references('student_code')->on('users');
+            $table->foreign('course_id')->references('id')->on('courses');
+            $table->foreign('user_id')->references('id')->on('users');
+            $table->foreign('teacher_id')->references('id')->on('users');
+            $table->foreign('exam_id')->references('id')->on('exams');
             $table->timestamps();
         });
     }

database/migrations/2017_12_27_025612_create_notifications_table.php

@@ -19,7 +19,9 @@ public function up()
             $table->tinyInteger('active');
             $table->text('message');
             $table->integer('student_id')->unsigned();
-            $table->integer('user_id')->unsigned();
+            $table->bigInteger('user_id')->unsigned();
+            $table->foreign('user_id')->references('id')->on('users');            
+            // $table->foreign('student_id')->references('student_code')->on('users');
             $table->timestamps();
         });
     }

database/migrations/2017_12_27_025631_create_feedbacks_table.php

@@ -16,8 +16,9 @@ public function up()
         Schema::create('feedbacks', function (Blueprint $table) {
             $table->increments('id');
             $table->text('description');
-            $table->integer('teacher_id')->unsigned();
+            $table->bigInteger('teacher_id')->unsigned();
             $table->integer('student_id')->unsigned();
+            $table->foreign('teacher_id')->references('id')->on('users');
             $table->timestamps();
         });
     }

database/migrations/2017_12_27_025644_create_books_table.php

@@ -14,7 +14,7 @@ class CreateBooksTable extends Migration
     public function up()
     {
         Schema::create('books', function (Blueprint $table) {
-            $table->increments('id');
+            $table->bigIncrements('id');
       		$table->string('book_code',50)->unique();
       		$table->string('title',250);
       		$table->string('author',100);
@@ -25,9 +25,12 @@ public function up()
             $table->text('about');
 			$table->string('type',10);
             $table->integer('price');
-            $table->integer('class_id')->unsigned();
-            $table->integer('school_id')->unsigned();
-            $table->integer('user_id')->unsigned();
+            $table->bigInteger('class_id')->unsigned();
+            $table->bigInteger('school_id')->unsigned();
+            $table->bigInteger('user_id')->unsigned();
+            $table->foreign('class_id')->references('id')->on('classes');
+            $table->foreign('school_id')->references('id')->on('schools');
+            $table->foreign('user_id')->references('id')->on('users');
             $table->timestamps();
         });
     }

database/migrations/2017_12_27_025738_create_forms_table.php

@@ -17,8 +17,11 @@ public function up()
             $table->increments('id');
             $table->string('name');
             $table->string('file_path');
-            $table->integer('school_id')->unsigned();
-            $table->integer('user_id')->unsigned();
+            $table->bigInteger('school_id')->unsigned();
+            $table->bigInteger('user_id')->unsigned();
+            $table->foreign('school_id')->references('id')->on('schools');
+            $table->foreign('user_id')->references('id')->on('users');
+
             $table->timestamps();
         });
     }

database/migrations/2017_12_27_025751_create_messages_table.php

@@ -18,8 +18,10 @@ public function up()
             $table->string('phone_number');
             $table->string('email')->unique();
             $table->text('message');
-            $table->integer('school_id')->unsigned();
-            $table->integer('user_id')->unsigned();
+            $table->bigInteger('school_id')->unsigned();
+            $table->bigInteger('user_id')->unsigned();
+            $table->foreign('school_id')->references('id')->on('schools');
+            $table->foreign('user_id')->references('id')->on('users');
             $table->timestamps();
         });
     }

database/migrations/2017_12_27_025806_create_faqs_table.php

@@ -17,7 +17,8 @@ public function up()
             $table->increments('id');
             $table->string('question');
             $table->text('answer');
-            $table->integer('user_id')->unsigned();
+            $table->bigInteger('user_id')->unsigned();
+            $table->foreign('user_id')->references('id')->on('users');
             $table->timestamps();
         });
     }

database/migrations/2018_02_06_161642_create_fees_table.php

@@ -16,7 +16,7 @@ public function up()
         Schema::create('fees', function (Blueprint $table) {
           $table->increments('id');
           $table->string('fee_name');// or Re-admisson
-          $table->integer('school_id')->unsigned();
+          $table->bigInteger('school_id')->unsigned();
           // $table->string('fine_fee');//penalty
           // $table->string('exam_fee');
           // $table->string('registration_fee');
@@ -28,7 +28,9 @@ public function up()
           // $table->string('internet_fee');
           // $table->string('farewell_fee');
           // $table->string('other_fee');
-          $table->integer('user_id');
+          $table->bigInteger('user_id')->unsigned();
+          $table->foreign('school_id')->references('id')->on('schools');
+          $table->foreign('user_id')->references('id')->on('users');
           $table->timestamps();
         });
     }

database/migrations/2018_03_26_105657_create_grade_systems_table.php

@@ -20,8 +20,10 @@ public function up()
           $table->float('point');
           $table->integer('from_mark');
           $table->integer('to_mark');
-          $table->integer('school_id');
-          $table->integer('user_id')->unsigned();
+          $table->bigInteger('school_id')->unsigned();
+          $table->bigInteger('user_id')->unsigned();
+          $table->foreign('school_id')->references('id')->on('schools');
+          $table->foreign('user_id')->references('id')->on('users');
           $table->timestamps();
         });
     }

database/migrations/2018_03_27_153448_create_issued_books_table.php

@@ -15,15 +15,19 @@ public function up()
     {
         Schema::create('issued_books', function (Blueprint $table) {
           $table->increments('id');
-          $table->integer('student_code');
-          $table->integer('book_id')->unsigned();
+          $table->bigInteger('student_code');
+          $table->bigInteger('book_id')->unsigned();
           $table->integer('quantity');
-          $table->integer('school_id')->unsigned();
+          $table->bigInteger('school_id')->unsigned();
           $table->date('issue_date');
           $table->date('return_date');
           $table->decimal('fine');
           $table->tinyInteger('borrowed');
-          $table->integer('user_id')->unsigned();
+          $table->bigInteger('user_id')->unsigned();
+          $table->foreign('student_code')->references('student_code')->on('users');
+          $table->foreign('book_id')->references('id')->on('books');
+          $table->foreign('school_id')->references('id')->on('schools');
+          $table->foreign('user_id')->references('id')->on('users');
           $table->timestamps();
         });
     }